Examples of a first share can not be achieved (since no block scope es5)
for(var i=0; i<list.length; i++ )
{
list[i].onclick = function(){
tabchange(i);
}
}
solution:
1.es6 new variable declaratively let (es6 have block-level scope, to solve the existing problems es5)
for(let i=0; i<list.length; i++ )
{
list[i].onclick = function(){
tabchange(i);
}
}
2. The use of closure
for(var i=0; i<list.length; i++ )
{
list[i].onclick = （function(){
return function(){
tabchange(i);
}
}）(i);
}
3. Create the corresponding index for the element object
for(var i=0; i<list.length; i++ )
{
list[i].myindex=i;
list[i].onclick = function(){
tabchange (this.myindex); // bind index corresponding to the elements
}
}
// This approach generally used for carousel map, of course, is the framework would not consider so many questions